Wrench.



O. HESSE.

WRENCH.

APPLICATION FILED MAR. 29, 1912.

1,050,215, Patented Jan.14,1913.

UNITED STATES PATENT OFFICE.

OTTO HESSE, OF ELBERFELD, GERMANY.

WRENCH.

To all whom it may concern:

Be it known that I, O'r'ro Hnssn, a subject of the German Emperor, andresident of Elberfeld, Germany, have invented certain new and usefulImprovements in Trenches, of which the following is a specification.

This invention relates to a wrench with open key for six-corneredscrew-nuts, of that kind in which a pivotally mounted jaw permits aratchetlike action of the wrench.

The invention consists in that the pivotal jaw is freely movable beyondits gripping position and the inner gripping face of the fixed jaw is sofar placed in the rear that the screw-nut does not come in touch withthe same.

The accompanying drawing shows the improved wrench.

Figure 1 is a side view of same, as made entirely of sheet iron, Fig. 2is an edge View of the wrench shown in Fig. 3, which shows a wrench madeof wrought iron.

The jaw a is immovably connected with the handle 1/, while the innergripping face 0 of said fixed jaw is so far placed in the rear that itdoes not come in touch with the screw-nut when the wrench is putthereon. The other jaw is pivoted and comprises an inner gripping face(Z and an outer one 6, it being pivoted on a bolt f fixed to an upperextension of the handle. The position of said bolt is so determinedthat, when pulling the wrench, the jaws rest always entirely on thenutand a closing movement can always occur, 6. 9. that in this way thenut tends always to slip into the key.

By omission of the inner gripping face 0 Specification of LettersPatent.

Application filed March 29, 1912.

Patented Jan. 14, 1913. Serial No. 687,246.

and by the jaws finding an abutment not only on one corner but on thewhole nut, as the fixed handle-extension 9 passes behind the jaw walland the movable jaw is freely movable without abutment, the fixed jaw ais allowed, when turning the wrench, to make a relative outwardmovement, 6. g. to slip along the corresponding side of the nut. Theinner gripping face (Z by its pivotal movement facilitates the completeentrance of the nut between the jaws, so that the wrench slipping-offthe nut, and other acci? dents, are avoided.

It lies within the scope of the invention to make the jaw a adjustable,in order to use the wrench for differently sized nuts.

I claim:

A wrench with open key for six-cornered screw-nuts, comprising a fixedjaw having an outer and an inner gripping face, the latter placed so farin the rear of said outer face that it does not come in touch with thenut, a handle integral with said fixed jaw,

an upper extension on said handle, and a movable jaw, having also anouter and an inner gripping face, pivotally mounted on said extensionand adapted to freely move beyond its gripping position, for the purposeset forth.

In testimony whereof I have hereunto set my hand in the presence of twosubscribing witnesses.

o'rro HESSE. a s] lVitnesses:

CHAS. J. WRIGHT, HELEN NUFER.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. C.

